| 1574054 |
squashes (general) |
Cucurbita pepo |
Single, orange fruit with large blistered areas characteristic of the pumpkin variety could be confused for mosaic virus symptoms. September 1997 |
| 5460047 |
common lilac |
Syringa vulgaris |
Virus-like symptoms. Unknown cause |
| 5460048 |
common lilac |
Syringa vulgaris |
Virus-like symptoms. Unknown cause. |
| 5430499 |
European mistletoe |
Viscum album |
This local place with Viscum album is the northernmost natural infestation in Norway of European misteltoe, here on Black cottenwood at University of Life Sciences (UMB). Probably infested by birds around 1989. Mistletoe was the first species to be protected in Norway. This was done by Royal Decree January 13, 1956. The protection was revised in a new Royal Decree of October 29, 1976. |
| 5431874 |
European mistletoe |
Viscum album |
Black cottenwood at University of Life Sciences (UMB). 20 meters up a tree infestated with European misteltoe Viscum album. Probably infestion by birds around 1989. |
| 5431875 |
European mistletoe |
Viscum album |
Black cottenwood at University of Life Sciences (UMB). 20 meters up a tree infestated with European misteltoe Viscum album. Probably infestion by birds around 1989. |
| 5424410 |
sugar maple |
Acer saccharum |
Leaves of silver maple showing marginal leaf scorch with distinct bands of discoloration between scorched and symptomless tissue caused by the bacterium, Xylella fastidiosa. |
| 5389334 |
downy birch |
Betula pubescens |
Leaf blister of birch |
| 5394187 |
common hop |
Humulus lupulus |
A common hop field at Oregon, USA. |
| 5394182 |
common hop |
Humulus lupulus |
A common hop field at Washington, USA. |
| 5334060 |
American elm |
Ulmus americana |
treated for Dutch elm disease |
| 1473136 |
fir mistletoe |
Phoradendron pauciflorum |
photo taken 5/1/1965 |
| 5372284 |
dodder |
Cuscuta spp. |
|
| 5367219 |
dwarf mistletoes |
Arceuthobium spp. |
Lodgepole pine trees infected with dwarf mistletoe (Arceuthobium sp.). |
| 5367217 |
dwarf mistletoes |
Arceuthobium spp. |
Dwarf mistletoe (Arceuthobium sp.) on a ponderosa pine. |
| 5361611 |
toothed spurge |
Euphorbia dentata |
View of the underside of a leaf of toothed spurge (Euphorbia dentata), showing symptoms of rust. The plant is growing as a weed in a field of dry beans. |
| 1473187 |
aspen/poplar |
Populus spp. |
Work was done on this syndrome in the 1970s as many isolated discoveries of the syndrome were made in the region. It is suspected to be an expression of a developmental disease resuting from a stress to roots; no virus or biotic agent found. Photo taken 9/1975 |
| 1473186 |
aspen/poplar |
Populus spp. |
Work was done on this syndrome in the 1970s as many isolated discoveries of the syndrome were made in the region. It is suspected to be an expression of a developmental disease resuting from a stress to roots; no virus or biotic agent found. Photo taken 9/1975 |
| 1473126 |
Pacific mistletoe |
Phoradendron villosum |
3/1/1964 |
| 1473006 |
quaking aspen |
Populus tremuloides |
|
| 1473013 |
quaking aspen |
Populus tremuloides |
tree #539 |
| 1473022 |
ponderosa pine dwarf mistletoe |
Arceuthobium vaginatum |
mortalty of tree with a dwarf mistletoe rating of 6 |
| 1473033 |
American dwarf mistletoe |
Arceuthobium americanum |
Lower infected crown of lodgepole pine; a small branch infection that is visually lost in the crown--example of how easy to overlook an infection. |
| 1495042 |
grape |
Vitis spp. |
grape |
| 5048064 |
American beech |
Fagus grandifolia |
Healthy bark of American beech |
| 5176068 |
roble beech |
Nothofagus obliqua |
Tree with symptoms of decline, IX Region, Chile |
| 5076061 |
cucurbits |
|
Fruit spllits caused by combinations of low temperature and slow to fast growth due to changing environmental conditions and increased nitrogen application. Split starts small, getting progressively larger as fruit size increases. |
| 5076065 |
watermelon |
Citrullus lanatus var. lanatus |
Physiological problem not associated with a disease. Small, brown lesions appear across a seam. Lesion is usually only as deep as the outer rind, but may allow introduction of other secondary fungi. |
| 5076085 |
watermelon |
Citrullus lanatus var. lanatus |
Slightly raised, corky rings appearing in clusters on the surface of the fruit. No decay is associated with this unexplained disorder. |
| 5077011 |
cucurbits |
|
Misshapen fruit. Incomplete seed development can be observed when sliced open. |
| 5077015 |
cucurbits |
|
lower stem area splits. Condition may be caused by combinations of low temperatures and slow to fast growth due to changing environmental conditions. |
| 5077023 |
cabbage |
Brassica oleracea var. capitata |
Internal browning of leaf tissue. Caused by a combination of low available soil calcium, inadequate root mass, extreme wet or dry soil conditions, and root pruning. |
| 5046078 |
sweet bay |
Laurus nobilis |
sooty mold and leaf symptoms |
| 5031023 |
white oak |
Quercus alba |
|
| 5032070 |
American beech |
Fagus grandifolia |
|
| 2111036 |
European mistletoe |
Viscum album |
symptoms of infestation; May 2001 |
| 2111037 |
European mistletoe |
Viscum album |
symptoms of infestation; May 2001 |
| 2168059 |
European mistletoe |
Viscum album |
|
| 2168061 |
European mistletoe |
Viscum album |
|
| 2168067 |
European mistletoe |
Viscum album |
|
| 2168068 |
European mistletoe |
Viscum album |
forested pasture near the city of Cluj-Napoca. Central Romania. |
| 2139074 |
pinyon dwarf mistletoe |
Arceuthobium divaricatum |
|
| 1467102 |
dwarf mistletoes |
Arceuthobium spp. |
swollen; no plants visible yet |
| 1467311 |
mistletoes |
Phoradendron spp. |
|
| 1467315 |
mistletoes |
Phoradendron spp. |
|
| 1467321 |
mistletoes |
Phoradendron spp. |
|
| 4215025 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
early symptoms: branch swelling, reduced apical dominance, witches' broom form. |
